In a Wednesday post on “The Steve Rubel Stream,” the blogger put forward the theory that the new Google Instant, which provides feedback for searches from the first letter you type in the search box, will have huge implications for search engine optimization. In the post, called “Google Instant Makes SEO Irrelevant,” Rubel writes: “Here's what this means: no two people will see the same web. Once a single search would do the trick - and everyone saw the same results. That's what made search engine optimization work. Now, with this, everyone is going to start tweaking their searches in real-time. The reason this is a game changer is feedback. When you get feedback, you change your behaviors."